... widely used in electronic, instrument, medical, spinning machine, aviation, shipping, machinery industries and other fields1. SPEC NO : 2A12, 2A11, 2A06, 2017 ... , and so on.5.Technique procedures: die casting ,make mould,extrusion ,CNC (milling finish),cutting,anodized6.Certificates ISO 9001:2000 ISO ... Shanghai and Suzhou City of China. Bright Finish Aluminum Alloy extrusion round bars for machinery